Ok,
I took measurements and made this drawing. These are what our front hubs look like:
As you can see, the hubs protrude a total of 3" from the mounting face.
The wheels I got only allow for about 2" of protrusion. I think I could make them work with 1/4" spacers, and leaving the center caps out (or making custom center caps). But I don't want to do that for various reasons.
I'm going to contact the people I bought them from to see what they want to do.
This is becoming a very frustrating situation...